I think we already knew this, although there is nothing I can find on the .gov.uk web site.
But a number of news sources are reporting a letter written by Liz Truss to the remaining members - three resigned last month.
ITV version www.itv.com/news/2021-04-13/government-disbands-lgbt-advisory-panel
BBC version www.bbc.co.uk/news/uk-politics-56731460
I think this has come up on earlier threads but thought I would post as a point of information.